I have been doing a little research on the splits today the same btu output applies to those as any ac or heat pump the 12,000 btu is only achieved with the fan on high speed @ max hp the btu's drop with different setting on fan speed a 12,000 btu unit drops to around 9,000 or less on some on low fan speed

I still don't see why the low amp draw would benefit a rv using a generator anyone care to enlightened on that one

I have been doing a little research on the splits today the same btu output applies to those as any ac or heat pump the 12,000 btu is only achieved with the fan on high speed @ max hp the btu's drop with different setting on fan speed a 12,000 btu unit drops to around 9,000 or less on some on low fan speed

I still don't see why the low amp draw would benefit a rv using a generator anyone care to enlightened on that one

If someone has a 15 kW generator, low current draw on two or three units makes not a hill of beans. I've chosen a much smaller gennie (for a number of reasons -- initial cost, physical size, noise level, fuel consumption, etc.) and three 15 Amp units, in addition other loads, would probably mean that I couldn't run all three units without severe "load reduction". Or maybe I couldn't run all three at the same time. The same principle applies to shore power -- we all think "I've got a 50 Amp plug" but many times were restricted by power supply design to 30 Amp or even less. (And, of course, you can't really pull a constant 30 Amp from a 30 Amp supply socket without being in great danger of blowing fuses or breakers, etc.)

For some people, the low amp draw doesn't matter; some other people might be able to live with a higher steady draw but blow breakers with startup current; other's might find that their families would rebel at not being able to use electric appliances when the air conditioners are running. But with my "keep it simple, keep it appropriately sized, keep it small enough to fit in the vehicle" approach, the low amp draw does apply.

Now you made my point why have 3 and you can only run 1 a generator is sized to run everything in a RV as most of the time you can run only run 2 roof tops if you are careful on a 50 amp plug but a generator will run all 3 at one time amps should not make a difference when on a generator jmo

It is fashion to have a breaker 2 times the amps draw I read the the 12,000 btu split requires a 20 amp breaker why if you only use 9 amps ?

I also see as Sean posted 220v is the way to go 3 of those would create a problem in most RV parks

It's interesting that most folks are buying the cheap splits.. For a few hundred dollars more you can get a Sanyo which is now Panasonic or a Mitsubishi. I think that it was Mitsubishi who really started the mini splits. I have purchased two 1 ton Sanyo's on clearance. I have seen a Soleous up close and the Sanyo spanks it for construction and materials. The condensors are thicker and look more heavy duty vs the Soleous unit. Time will tell.

Interesting enough the lower priced units are mentioning the Sanyo components. They don't look the same when you pull the covers off.

I have a rooftop low profile rv ac in the bedroom that we almost never use too much noise,too much air flow.we use a small fan to move the air from the front split unit to cool the whole bus when camping. I have a 30 amp 120 volt plug,prosine 2000 watt inverter charger ,3500 watt inverter gene that we hardly use.Almost all the state and provincial parks we stay in only have 30 amp plug- ins . When we started the conversion way back in 2006 I tried to build as efficiently as possible .Lots of insulation ,low power draw,simple heating and cooling . How things have changed, original appraisal in 2006 on the rv was $ 210,000 for insurance. Ha! sold sold sold! In today's world at the price of used bus/rvs I have decided to lower my standards so I have too much invested in it now.But as a hobby I love it dave

Now you made my point why have 3 and you can only run 1 a generator is sized to run everything in a RV as most of the time you can run only run 2 roof tops if you are careful on a 50 amp plug but a generator will run all 3 at one time amps should not make a difference when on a generator jmo

I ran two 15K BTU rooftops for at least a month this summer on just a 30 amp service. Only tripped the breaker once when I tried to run too many things at once. Granted, I didn't have the fridge (or anything else) running, but I did have the inverter running in charge mode.

Good breaker Belfert 2 will draw more than 30 amps running I have never saw a rv even setup to run 2 on 30 amps most have a switch of some type to change ac units

My bus is wired for 50 amp service. I use a 50 amp to 30 amp converter at home as my home electric was installed for my previous 30 amp travel trailer. The specs for the Carrier units show them using under 15 amp each, but we all know specs lie especially when the temps were in the 90s outside. I don't know why it worked, but it did work.

I wouldn't mind having 50 amp service at home, but the cost and difficulty of running the wires stop me. Since I can run both rooftops on 30 amps I just postpone the upgrade.

I placed one on the driver's side, and one on the passenger side of the same bay. Of course, we had to cut square openings in the cargo bay doors, and protect them with expanded metal. We also built scoops to vent them through the floor. Floor openings were protected with expanded metal. If my pictures there don't help, let me know, and I will take a few million more.

These units we bought here in Mexico take a maximum of 8.5 amps, @ 127 volts. These are one ton (12,000 BTU) units, and also have heating strips. We have a 3 KW nominal (4 KW peak) inverter, which should run them O. K. running down the road.

Also (somebody else give your input) maybe a 9,000 BTU might be small for the driver's area going down the road in the sun. That windshield takes a lot of heat!

Thank You. Those are the first pictures I've seen of mini-split installation. Pictures are worth so much to me.

You said in your post, "When traveling, there is higher air pressure on the side of the bus, than under the bus". Is this true? So, I should pull air from the side and vent down through the floor? I would have done just the opposite.

As far as the 9000 BTU size... first, our climate is much cooler than yours. Second, my coach is heavily insulated with spray foam. Third, I hope to have driver AC while the engine is running.

Dave

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I couldn't repair my brakes, so I made my horn louder.1989 MCI-102 A3DD 6V92 Turbo, AlisonTons of stuff to learn!Started in Cheboygan, Michigan (near the Mackinaw Bridge). Now home is anywhere we park